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HMMT 二月 2007 · GEN1 赛 · 第 7 题

HMMT February 2007 — GEN1 Round — Problem 7

专题
Contest Math / 竞赛数学
难度
L3
来源
HMMT

题目详情

英文原题

  1. [ 4 ] Jack, Jill, and John play a game in which each randomly picks and then replaces a card from astandard 52 card deck, until a spades card is drawn. What is the probability that Jill draws the spade?
    (Jack, Jill, and John draw in that order, and the game repeats if no spade is drawn.)
解析

英文解析

  1. [ 4 ] Jack, Jill, and John play a game in which each randomly picks and then replaces a card from astandard 52 card deck, until a spades card is drawn. What is the probability that Jill draws the spade?
    (Jack, Jill, and John draw in that order, and the game repeats if no spade is drawn.)
    Answer: . Same as Combo #3.12
    37